set to pbs_in_turb, fix tests

pbs_in_failed, silent switches for printing
create pbs_in files for Mann64 turbulence generator

- number of interpolation points added to "compute_envelopes"

WIP: place failed cases in pbs_in_failed

- Loads in output are array of consistently same length

wrong cycle_matrix definition, add silent throughout
the stack to suppress printing messages

as optional format to save statistics in

Something went really wrong with the merge at e0e8c0d3. As a result, changes made by @dave where reverted in the merge. This commit restores those changes

more PY2 vs PY3 differences that required a change: new line character is 1 char in PY3, passing dict as kwargs when calling a function

integrate dlc.high_level with prepost.Simulations, use pandas for Excel reading in dlc.high_level, cosmetic changes